How to Convert an Entire Scanned PDF to Editable Text with OCR
Question details
The user wants to apply Optical Character Recognition (OCR) to an entire scanned PDF document simultaneously rather than processing it page by page.
- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Editing a multi-page scanned PDF document and needing all text and images to be editable or searchable in a single operation.
- Observed behavior
- By default, the PDF editor only runs OCR on the page currently in view, requiring the user to wait for processing each time they scroll to a new page.
Ensure you have saved the document before starting the OCR process, as converting a large file may take several minutes and temporarily make the application unresponsive.
Convert All Pages to Editable Text in the Edit Tool
Use the Scanned Documents settings to force the application to process the entire document for full text and image editing.
By default, Acrobat and some other PDF editors only convert the current page to save processing time. Changing this setting will convert every page at once, which is ideal if you need to edit the entire document.
Open your scanned PDF and select the 'Edit PDF' tool from the right-hand tool pane.
Locate the 'Scanned Documents' section in the right-hand pane and click on 'Settings'.
Check the option labeled 'Make All Pages Editable' and confirm. The application will now run OCR across all pages in a single operation.
Use Scan & OCR for Searchable Text Only
If you only need to copy or search text without editing images, this method is significantly faster.
Easily Convert Entire Scanned PDFs with WPS Office
WPS Office provides a highly accurate, built-in OCR feature that quickly converts entire multi-page scanned PDFs into fully editable Word, Excel, or searchable PDF documents in just a few clicks.
- 1. Open your Scanned PDF: Launch WPS Office and open your scanned PDF document.
- 2. Access the OCR Tool: Navigate to the 'Tools' tab and click on the 'OCR' button.
- 3. Choose Conversion Type: Select 'Extract text' or 'Convert to Word' depending on whether you need plain text or a fully editable document layout.
- 4. Process All Pages: Ensure the page range is set to 'All Pages', then click 'Extract' or 'Convert' to process the entire document.
Frequently Asked Questions
Why does OCR take so long on large PDF documents?
Processing a large document requires significant computing power because the software must analyze every image and character across multiple pages. For documents with lots of high-resolution graphics or complex layouts, this process can take several minutes to complete.
Can OCR recognize and convert musical notation?
No, standard PDF OCR tools are designed specifically for alphanumeric text and basic formatting. To recreate, edit, or transpose musical scores, you will need specialized optical music recognition (OMR) software.
Is there a way to run OCR on multiple PDF files at once?
Yes, advanced PDF editors offer batch processing options. You can use the 'Scan & OCR' tool in Acrobat and select 'In Multiple Files', or use the batch conversion features in WPS Office to apply text recognition to an entire folder of PDFs simultaneously.
Why are my images not editable after running OCR?
If you used a 'Searchable Image' or basic text-recognition mode, the software only overlays invisible text for searching and copying, leaving the image layer untouched. You must select an 'Editable Text and Images' setting to actively alter the graphics.
